Sliding door binder



Filed July 12, 1960 C. F. DUSING SLIDING DOOR BINDER 2 Sheets-Sheet 1 NVENTOR. [9 3 U/zar/es Eda/5mg F' a BY 1 I (ZAML l8 [7 /6 am ATTORNEYS.

June 19, 1962 c. F. DUSING 3,039,153

SLIDING DOOR BINDER Filed July 12, 1960 2 Sheets-Sheet 2 3- If I 3 16 1 22 2/ /o 11 IN V EN TOR.

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ite States 3,639,153 Patented June 19, 1962 has 3,939,153 SLIDING DOOR BINDER Charles F. Busing, Leroy, N.Y., assignor to Busing and Hunt, Inc, Buffalo, N.Y. Filed July 12, 196%), Ser. No. 42,331 2 Claims. (Cl. 20-19) This invention relates to sliding door structures for buildings and more particularly to means provided in combination with such door structures for insuring that the door moves into a position closely against the door frame or building wall when the door moves to closed position and for holding the door in such close engagement while the door is in closed position.

While the principles of the present invention may be employed in conjunction with sliding doors of various types and for various purposes, the same will be discussed herein particularly as related to sliding fire doors such as are commonly used in industrial and commercial building structures. In the case of such door constructions the problem of holding the sliding door in very close and secure position against the door opening is particularly acute since the ultimate fire stopping or fire barrier efliciency of the door depends to a substantial extent on the degree to which the clearance between the door margins and the building wall or door frame is restricted when the door is closed.

The door retainer or binder attachments of the present invention are relatively simple in construction and perform their desired functions without moving parts and are rugged, durable and dependable in use, Also, the parts are extremely simple and economical to manufacture and are readily attached to the building structure and to the door.

A single specific embodiment of the door binder arrangement of the present invention is illustrated in the accompanying drawings and described in detail in the following specification. However, it is to be understood that such embodiment is by way of example only and that the details of construction may be modified in various ways without departing from the principles of the invention, the same being limited only as defined in the appended claims.

In the drawings:

FIG. 1 is a general elevational view of a building wall having a sliding door in closed position and equipped with a plurality of binder devices constructed in accordance with one form of the present invention, portions of the door being broken away for added illustration;

FIG. 2 is an elevational view of one of the doormounted components of the binder device of the structure illustrated in FIG. 1;

FIG. 3 is a central horizontal cross sectional view through the binder device component of FIG. 2;

FIG. 4 is a fragmentary cross sectional view on the line IV--IV of FIG. 1;

FIG. 5 is a fragmentary cross sectional view on the line VV of FIG. 1; and

FIG. 6 is an elcvationa] view of one of the buildingmounted components of the binder device of the present example.

Referring first particularly to the general elevational view, FIG. 1, the numeral 10 indicates a building wall having a door opening 11 therein and the numeral 12 designates a sliding fire door in closed position with respect to the opening 11. The body of the door 12 may be of conventional construction and a fixed channel 13 mounted above the door opening suspends the door for sliding movement between open and closed positions in the usual manner.

In the arrangement set forth in FIG. 1, and of course merely by way of example, the door 12 is provided with five of the binder devices of the present invention, one at the top edge of the door and two at each of the vertical edges thereof. In FIG. 1 the binder assemblies are indicated generally by the reference numeral 15 and, since the door 12 is shown in closed position, the binder devices are illustrated in their interlocked door-retaining positions.

Each binder assembly 15 comprises a door-mounted component and a building-wall-mounted component and one of the door-mounted components is illustrated in detail in FIGS. 2 and 3. Referring to these figures, each door-mounted component comprises a generally rectangular plate 16 having a raised central panel portion 17 spaced inwardly from three of the edges of the plate 16 and contiguous with the fourth edge, all as clearly illustrated in FIG. 2. The contiguous edge of panel portion 17 is formed with a recess 18 and its contiguous edge portion is formed into a knife edge or V shape as shown at 19 in FIGS. 2 and 3.

One of the building-mounted components of the binder assembly set forth herein by Way of example is illustrated in detail in FIG. 5 and comprises a shank or stem portion 21 and a head portion designated generally by numeral 22. Head portion 22 comprises a pair of spaced disc members 23 and 24 which are provided with knife edge peripheries as clearly shown in FIG. 6 to provide a tapering entrance way to the space between the disc members 23 and 24.

In the form illustrated in FIG. 6 the head portion 22 includes a plastic or like non-metallic insert 25 at its outer face to provide a smooth rubbing anti-friction surface for engagement against the door surface as the door slides in proximity thereto. The smooth bearing thus provided avoids or minimizes the possibility of marring or scrap ing of the door surface as the latter slides in proximity to the head portion 22. The opposite end of shank 21 is threaded as at 26 to receive nut means, as at 27 in FIG. 4, for securing the shank through a building wall, door frame or other structure surrounding or lying adjacent to a door opening.

The manner in which the binder parts illustrated in I detail in FIGS. 2, 3 and 6 cooperate in use will now be described with particular reference to FIGS. 4 and 5. The manner in which the building mounted components are mounted by passing the shanks 21 thereof through the building wall is clearly shown in FIG. 4. Because of the circular form of the heads 22 these parts do not need to be mounted in any particular angular position and fabrication thereof is extremely simple, the lathe-turned heads 22 being merely welded to the shanks 21 as at 29 in FIG. 6.

The door mounted plate members 16 are attached to the inner sides of the doors, that is, the side of a door which is toward the building, and the base portions of the plate members 16 are mounted against the door with offset plate portions 17 spaced from the door in the direction of the building wall as illustrated in FIG. 4.

In the illustrated instance the plate members 16 are provided with screw holes, as at 30 in "FIG. 2, and the door 12 is provided with marginal framing channel members 31 against which portions of the plate members 16 abut. Sui-table spacing washers 32 and 33 are employed beneath other portions of the plate members 16 to space the same from the body of the door 12 a distance equal to the thickness of the framing channels so that the plate members lie fiat and parallel to the plane of sliding movement of the door.

As the door slides toward closed position the knife edge formations 19 of the several plate members 16 engage between the disc members 23 and 24 of the heads 22 of the building mounted members and the portions of olfset 17 of the plate members 16 which lie adjacent to slot 18 are thus guided into accurate alignment between the disc members 23 and 24, the final closed positions of the parts being as clearly illustrated in FIGS. 4 and 5.

As appears from a consideration of FIGS. 4 and 5, the metal thickness of the raised portion 17 of each plate member 16 is only slightly less than the space between the disc members 23 and 24 of the building-mounted component with which it interlocks. Accordingly, when the marginal portions of the plate adjacent to the recess 18 engage between the disc members 23, 24 the door is closely held against relative movement in a direction perpendicular to the door opening and this fit may be close enough to afford a degree of frictional engagement tend; ing to maintain the door against opening movement.

I claim:

1. In combination with a building wall having a door opening therein and a sliding door supported for movement generally along a face of said wall between open and closed positions with respect to said door opening, means operable by and upon sliding movement of said door to closed position for retaining the door securely against the building wall, said means comprising a building Wall mounted member and an interfitting door mounted member, said wall mounted member comprising a shank member adapted to be attached to the building Wall and a head member adapted to be disposed at the face of said wall with which the sliding door is associated, said head member com-prising a pair of axially spaced disc elements each having a V-shaped periphery to provide a guiding entranceway to the space between said disc elements and a portion of reduced diameter connecting said disc elements, said door mounted member comprising a base plate portion attachable to the face of said door toward the building wall and a portion offset toward the building wall, said offset portion having a free edge thereof of V shape and facing in the direction of closing movement of said door, said V-shaped free edge having a medial slot extending inwardly therefrom, said building wall and door mounted members being so located that upon final closing movement of the door the V-shaped free edge of the offset portion of the door mounted member enters the guiding entranceway between said disc elements with said slot moving about the reduced diameter connecting portion of said building wall mounted head member to retain said door against movement away from the building wall by engagement of said offset portion between said disc elements.

2. In combination with a building wall having a door opening therein and a sliding door supported for movement generally along a face of said wall between open and closed positions with respect to said door opening, means operable by and upon sliding movement of said door to closed position for retaining the door securely against the building Wall, said means comprising a building wall mounted member and an interfitting door mounted member, said wall mounted member comprising means for attachment thereof to the building wall and means adapted to be disposed at the face of said wall with which the sliding door is associated, said last mentioned means comprising a par of spaced plate elements and means connecting said plate elements, said door mounted member comprising a base plate portion attachable to the face of said door toward the building wall and a portion offset toward the building Wall, said offset portion having a free edge thereof facing in the direction of closing movement of said door, said free edge having a medial slot extending inwardly therefrom, said building wall and door mounted members being so located that upon final closing movement of the door the free edge of the oifset portion of the door mounted member enters between said plate elements with said .slot moving about the connecting means of the plate elements of said building wall mounted member to retain said door against movement away from the building wall by engagement of said off-set portion between said plate elements.

References tilted in the file of this patent UNITED STATES PATENTS 71,468 Eanley Nov. 26, 1867 605,899 McNish June 21, 1898 972,466 McAfee Oct. 11, 1910 1,604,099 Johnson Oct. 19, 1926 2,878,532 Clark Mar. 24, 1959 FOREIGN PATENTS 556,833 Great Britain Oct. 25, 1943 

